Pregled bibliografske jedinice broj: 537627
On the anomalous large-scale flows in the Universe
On the anomalous large-scale flows in the Universe // European physical journal C : particles and fields, 69 (2010), 3/4; 581-589 doi:10.1140/epjc/s10052-010-1396-1 (međunarodna recenzija, članak, znanstveni)
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Naslov
On the anomalous large-scale flows in the Universe
Autori
Palle, Davor
Izvornik
European physical journal C : particles and fields (1434-6044) 69
(2010), 3/4;
581-589
Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni
Ključne riječi
large-scale flows; universe
Sažetak
AB Recent combined analyses of the CMB and galaxy cluster data reveal unexpectedly large and anisotropic peculiar velocity fields at large scales. We study cosmic models with included vorticity, acceleration and total angular momentum of the Universe in order to understand the phenomenon. The Zel'dovich model is used to mimic the low redshift evolution of the angular momentum. Solving coupled evolution equations of the second order for density contrast in corrected Ellis-Bruni covariant and gauge-invariant formalism one can properly normalize and evaluate integrated Sachs-Wolfe effect and peculiar velocity field. The theoretical results compared to the observations favor a much larger matter content of the Universe than that of the concordance model. Large-scale flows appear anisotropic with dominant components placed in the plane perpendicular to the axis of vorticity (rotation). The integrated Sachs-Wolfe term has a negative contribution to the CMB fluctuations for the negative cosmological constant and it can explain the observed small power of the CMB TT spectrum at large scales. The rate of the expansion of the Universe may be substantially affected by the angular momentum if its magnitude is large enough.
Izvorni jezik
Engleski
Znanstvena područja
Fizika
POVEZANOST RADA
Projekti:
098-0000000-3277 - Teški Majorana neutrini u fizici čestica i kozmologiji
Ustanove:
Institut "Ruđer Bošković", Zagreb
Profili:
Davor Palle
(autor)
Citiraj ovu publikaciju:
Časopis indeksira:
- Current Contents Connect (CCC)
- Web of Science Core Collection (WoSCC)
- Science Citation Index Expanded (SCI-EXP)
- SCI-EXP, SSCI i/ili A&HCI
- Scopus